Drawing device for spinning frames and for preparatory machinery



June 9,- 1931.

J. PFLlMLIN DRAWING DEVICE FOR SPINNING FRAMES AND FOR PREPARATORY MACHINERY Original Filed NOV.

1N VEN TOR 747/66 7 [17%[570 A TTORNEY Patented June 9, 1931- i JULIE BELIMLIJllZ-Qll' MULHOUSE, FRANCE nmwmejimwommn .srlivimis remroe; r-semm onr Originalapplication filed 192s. Divided and this application filed i anuary 6,1193). Serj a1 Nml418fi12. r

This invention relates to sliver or roving drawing devices devised for the drawing effected by spinning frames, as also by preparatorymachine's and for drawin gframes. More particularly it relates ,to an improved drawing roll, especially effective for middle top rolls. t a

This application is a division of myU. S. patent for improvements in drawing devices forspinning frames and for preparatory ma-,

chinery No. 1,749,393, dated March 4, 1930, in

vwhich the greater efficiency of drawing rolls p having great resiliency and compressibllity or suppleness 1s set forth, and in which. is

claimed a deformable sleeve for drawing 7 rolls characterized by a hub and an outer skin with partitions forming .a number of hollow compartments therebetween. My present invention is" particularly con:

99 cerned with a form of sleeve or working memher for drawing rolls which is so constructed as to provide a single hollow compartment between the working member andlthe arbor which supports said member.' The single" hollow compartment is,'in effect, an air cush ion for supporting the working portion of the drawing roll, greatly increasing the suppleness and compressibility of the-roll over other forms while maintaining a uniform deiso gree of compressibility about its whole-cir-,

cumfer'ence and throughout its length.

The nature of my invention will be under-- .stood from the following description of the accompanying drawings in which:

Figure 1 is a cross-sectional view of the preferred construction of the drawing roll I,

sleeve; I v

Fig.- 2 is a cross-sectional View of a sl1ghtly modified form of the drawing roll sleeve Fig. 3 is a view, in perspective, of the sleeve before assembly on a metalarbor; and Figs. 4 and '5 illustrate, in longitudinal cross-section, two waysin which the sleeve may be mounted onan arbor.

The sleeve is a moulded product and pref erably is formed of soft rubber having a high degree of resiliency. The mould is formed" to produce a cylindrical'envelope having a comparatively thin circumferential or tubufacture of drawing rolls.

lar wallilfl the endsz of'wh-ich-areclosed by disks -or;walls 12 each havingaentral, circus f lar aperture 141m receivingthe shaft ofa November 10, 1928, Serial No:- 31 8,558 andin'Great Bri tain andFrance May'EQ,

metal-arbor as usually employed in the manu- The end walls 12 may. be madevthinner than the wall 10.. and

quently afconstant degreewof deformation throughout the length of the sleeve-"when Theend -wallghaving relatively lessf strengtlr in: f

ressed against a co+acting-drawi ng roll.

th-an tthe centralworkingfportion ofTth'e sleeve, act as fiexiblejointsonhinges on which thest iffer workingportion may move in and QUlJifTGBlYEiIL'PGSDOIISB130 deforming pressuresv f under; workingQOonditions. The clrcular apertures li i serve to seat the sleeve concentrically to the shaft: of the arbor and the di' ,ameter of the 'sleeveis so much 'largerjthan I w that of the shaft that an annular airch'am ber=isformed between' the Shaft and sleeve of greater depth than the greatest degree-of deformation. Figs; 4 and I 5 I have ;indi

catedtwoof'the ways inwhich the sleevemay i v I be mounted on-an arbor, in Fig; ion a collarlessarbonand-inFig. 5 betweena pair of collars. Itwill be understood that the rub- .ber sleeve WilL be covered'by a cot of some; I thin andfie'xible le'athe'r the ends; of which are secured to the arbor,as'practi'eed-in this" art, to protect the rubben and to provide the drawing roll with a surface best suited to engagernent' with th esliver and to draft the same with the greatest efliciency. l 7

Fg: 2shows-the sleeve modified by ncreasing the thickness of -lthecircumferential or working portion 16 progressively toward the"v middle thereof to furthercompensatefor any stifine'ss at the ends 'of' the working portion 1;

that may beoflered bythe'end walls 12"."

4 Those sk'lled -'n the art will recognizeithe f great increase suppleness of i drawingfrolls' formed '111ac001'daI1C8 'wlth my invention over rolls' compris'ing 'a'sleeve of solid material on an arbor howeverelastic'saidrnat'erialmay be, and also. over rolls having} the working surface'of'the sleeve supported by eitherlon gitudinal'or radial p a rtit' ions whiohebreak up s to extend axially of a supporting arbor and out of contact therewith, said sleeve having annular end walls engaging said arbor that are more flexible than said working portion.

7. Ina drawing roll for spinning frames and the like, a flexible hollow sleeve having a relatively strong central working portion an d end walls of relatively less strength to act as hinges on, which the working portion may move in and out in'response to deforming pressures under working conditions.

In testimony whereof I aflix my signature.

JULES PFLIMLIN.

drawing rolls or spinning frames and the like, v

or for preparatory machines and drawing frames. I also believe that I am thefirst to devise a drawing roll having. great suppleness due to a material longitudinally depressible thickness provided betweenthe metal arbor and the outer sheath or skin, a portion of said thickness comprismg a single annular chamber of air anda portioncomprising a flexible sleeve.

The drawing roll ofthis invention is particularly useful as a middle top roll but its use is not restricted thereto.

The nature and scope of my invention having been indicated, and its preferred embodi ments having been specificallyv described, what is claimed as new, is 1. A drawing'roll for spinning frames and preparatory machinescomprisi-ng a resilient, hollow'cylindrical sleeve member having provided integrally therewith at its ends lateral disks, constituting supple end walls partially closing the sleeve vmember and forming hubs.

to receive an arbor.

2. A drawing roll for spinning framesand preparatory machines according to cl'aiml in g Y' which the circumferential wall of the sleeve member is of inwardly increasing thickness from its endstoward its middle. Y

3. A drawing roll for spinning frames and preparatory machines according to claim 1 in. which the strength of the end walls of the,

sleeve member is lessthan thatof its circumferential wall. 1 I 4. A drawing roll for spinning framesand preparatory machines according to claim 1 I and said sleeve 'having fiexibleend walls to in which the lateral disks constituting end walls are dished to bulge outward.

5. A drawing roll adapted to be mounted I v on an arbor comprising'a tubular sleeve of material readily deformable under pressure, theinternaldiameter of said sleeve being much greater than thediameter of the arbor,

engagethearbor and hold the circumferential working portion of the roll in spaced concentric relation to the arbor whereby to form an annular air cushion between, said working portion and the arbor.

6.. A'drawingroll for spinning frames and the like comprising a=tubular sleeve having a working portionof fiexible'material adapted 

